Radio frequency characteristics of HVDC convertor station components

The use of HVDC convertor stations in electric power transmission systems is increasing. The fast switching occurring in these stations is a potential source of considerable wide-band RF energy which could interfere with power-line carrier, computer and communications systems, related or unrelated to the operation of the station. Understanding and controlling this operational condition requires a knowledge of the RF properties of power frequency components. Methods of measuring these properties are described and some typical results presented, together with a brief discussion on how these characteristics may combine to reduce or aggravate the problem